Steam-generator.



L. STEINM'I'ILLER. STEAM GENERATOR.

APPLICATION FILED MAR. 7, 1912.

1,969,298. Patented Aug. 5, 1913,

W Clam W i i ivzfgd COLUMBIA PLANOGRAPH C(I'WASHINGTON, n. c.

LEBREGHT STEINMITLLER, 0F GUMMERSBAGH, GERMANY.

STEAM-GENERATOR.

Specification of Letters Patent.

Patented Aug. 5,1913.

Application filed March 7, 1912. Serial No. 682,183.

To all whom it may concern:

Be it known that I, LEBREOIIT STEIN- Mr'iLLnR, a subject of the King of Prussia, and resident of Gummersbach, in the Province of the Rhine, German Empire, have invented a new and useful Improved Steam- Generator, of which the following is a specification.

This invention relates to water tube steam generators of the type in which the furnace gases after passing through the furnace chamber pass through an opening in the broad side of a rectangular flue in which are arranged water tubes so that the gases pass through said flue in one direction only.

My present invention consists firstly in reducing the breadth of said rectangular flue so as to provide a flue of smaller breadth than the breadth of the furnace chamber and of the water tube element in closed in said chamber, the space thereby obtained at the narrow sides of the flue being utilized for economizer tubes which are inclosed in auxiliary flues filling upsaid spaces and in connection with the main flue. By this means it is possible to provide economizer tubes without increasing the space taken up by the steam generator, while at the same time the radiating surface of the steam generator is diminished and moreover the radiating surface of the main flues constituted by its narrow sides is inclosed by said auxiliary fiues. Moreover by arranging the auxiliary flues on each narrow side of the main flues, the furnace gases are more evenly distributed over the main flue and thus more fully utilized, while at the same time the loss in the draft of the furnace is diminished to the lowest possible degree, thus increasing the durability of the furnace fire bars, as a greater draft is available in the furnace chamber.

A further object of the invention consists in connecting the economizer tubes to common water drums at each side of the furnace and arranging said water drums over their whole length in the furnace gas flues. By this means greater water space and heating surface is provided without increasing the dimensions of the steam generator, while at the same time the steam generator is enabled to respond more readily to sudden increases in steam consumption, while by increasing the heating surface exposed to thedhot gases the latter are more fully utilize In order to make the invention more clear,

reference is made to the accompanying drawings, which show various constructions of my improved steam generator by way of example.

Figure 1 is a vertical section on the line AB of Fig. 2, showing a steam generator having a substantially vertical water tube element arranged within the furnace chamber. Fig. 2 is a transverse section on the line CD of Fig. 1. Figs. 3, 4 and 5 show a modified form of Fig. 1, applied to a steam generator having an inclined water icjube element inclosed in the furnace chamer. Fig. 4. Fig. 4 is a vertical section on the line GH of Fig. 3. Fig. 5 is a transverse section on the line IJ of Fig. 4.

Referring to Figs. 1 and 2 of the drawings: 1 designates the furnace chamber within which is arranged aninclined water tube element comprising an upper water drum 2 and lower water drum 3 connected by means of tubes 4, which are divided by means of a transverse partition 5, so as to cause the gases rising from the furnace fire bars 6 to rise upwardly through the forward half a of the water tubes 4, as inclicated by the arrows in Fig. 1. Arranged in the rear of the furnace is a flue 7 of a somewhat smaller breadth than the breadth of the furnace chamber 1, as may readily be seen on reference to Fig. 2, said fiue 7 communicating below at 8 with the lower part of the furnace chamber 1 over its whole breadth. Intermediate the water tubes 4 and the flue 7 is a superheater 9 suitably mounted in, position and intermediate the water tubes 4 and the superheater 9 is pro vided the usual pivoted baffle plate 10 whereby the gases rising upwardly through the forward half a of the water tubes 4 are directed through the superheater 9 and then in a downward direction through the rearward half of the water tubes 4, through the aperture 8 into the flue 7 within which are arranged water tubes 11 connected above to a water drum 12 and below to a water drum 13, the gases rising through the flue 7 and thereupon passing through upper lateral apertures 14 into auxiliary flues 15 and 16 respectively arranged at the two narrow sides of the main flue 7, the gases passing down the fiues 15 and 16 and to the chimney by flues 17 and 18 respectively. Arranged within the auxiliary flues 15 and 16 are Fig. 3 is a section on the line EF of groups of economizer tubes 19 connected to upper and lower water drums in a manner similar to the water tubes 11.

, Figs. 3-5

steam generator in which the economizer water tubes are arranged on both sides of the furnace instead of at the rear of the furnace as in Figs. 1 and 2.

In the form of my invention illustrated in Figs. 8 to 5, 20' designates the furnace chamber within which is arranged an inclined water tube element- 21 and superheating tubes Arranged on each side of the furnace chamber, are main vertical fines 23, said main flucs 23 communicating above over their whole breadth through apertures 2% with the furnace chamber 20; -Arranged within the vertical flues 23 are a plurality of water tubes 2-5 connected above to water drums 26 and below to water drums 27. On both narrow sides of each of the main flues 23 are provided auxiliary flues 28 and 29 containing economizer water tubes 30 and 31 respectively, each pair of water tubes groups 30 and 31 being connected above to a common water drum 32 and below to a common water drum 33, the water drum 32 being entirely inclosed within an upper flue 3st while the lower water drums 33 are likewise inclosed over their whole length within the lower horizontal fines 35, the lower flue being in direct communication with each of the fines 23, 28 and 29. It will thus be seen-that the furnace gases after passing through the inclined tube element 21 and superheater tubes 22 will pass laterally on both sides of the furnace through the apertures 2% in a downward direction through the main flues 23 into the lower fines 35 and then rise upwardly through the auxiliary fines 28 and 29 into the upper horizontal fines 3%, from whence the gases are passed tothe chimney.

I claim l. A steam generator comprising a furnace, afurnace chamber, a water tube element therein, a main rectangular flue comnmnicating over the whole width of its broader side with the furnace chamber, water tubes therein, auxiliary flues arranged at the narrower sides of said main flue and communicating at one end therewith, an i of the drawings illustrate a nace, a furnace chamber, Lment therein, municating over the whole width of its exit fine at the other end of said auxiliary fines, and economizer tubes located in said 1 auxiliary fines.

2. A steam generator comprising a fura water tube elea main rectangular flue combroader side with the furnace chamber, but

of narrower breadth than the corresponding dimension of said furnace chamber, water tubes therein, auxiliary flues arranged at the narrower sides of said main flue and communicating at one end therewith, an exit fine at the other end of said auxiliary fines, and economizer tubes located in said auxiliary fiues.

3. A steam generator comprising a furnace, a furnace chamber, a water tube element therein, a main rectangular flue arranged at the side of said furnace chamber and communicating over the whole width of its broader side with the furnace chainber water tubes therein, auxiliary fines ranged in front of and in the rear of said main fine and communicating below therewith, an exit flue at the upper end of said auxiliary fines, and economizer tubes located in said auxiliary fines.

4. A steam generator comprising a fur nace, furnace chamber, a water tube element therein, a main rectangular flue communicating over the whole width of its broader side with the furnace chamber, water tubes therein, auxiliary flues arranged at the narrower sides of said main fine, a lower horizontal flue communicating directly with said main flue and said auxiliary flues, an upper horizontal flue connecting said auxiliary fines above and communicating with an outlet for the hot gases, economizer tubes located in said auxiliary fines, and upper and lower water drums common to said economizer tubes in said auxiliary fines and entirely inclosed within said upper and lower horizontal fines respectively. v

In witness whereof I have hereunto set my hand in the presence of two witnesses.

LEBREGHT STEINMULLER. \Vitnesses P. WISSNER, Eunsr Binnie.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

